> ## Documentation Index > Fetch the complete documentation index at: https://docs.tokenfactory.nebius.com/llms.txt > Use this file to discover all available pages before exploring further. # kill - Cancel operations **`contree kill` is a top-level shortcut for [operation cancel](./operation) (`contree op cancel`).** Both share one argparse setup and one handler. The top-level `kill` accepts the same positional UUIDs and `--all` flag as `op cancel`, including multiple UUIDs in a single invocation. See the [operation - Manage operations](./operation) page for the full description. Cancel running operations. Only active operations (PENDING, ASSIGNED, EXECUTING) can be cancelled. ## Examples ```bash theme={null} # Cancel a specific operation contree kill 3f2a7b... # Cancel multiple operations in one call contree kill 3f2a7b... a1b2c3... 9d8e7f... # Cancel all active operations contree kill --all ``` ## Help output
\$ contree kill --help
usage: contree kill \[-h] \[-a] \[UUID\_OR\_REF ...]

Manage operations (list, inspect, cancel).

Aggregates ps/show/kill under a single namespace, and adds multi-UUID
support to \`\`show\`\` and \`\`cancel\`\` so several operations can be acted
on in one invocation.

Subcommands:
  list (ls)             List operations. \`\`contree ps\`\` is an alias.
  show UUID \[UUID...]   Show one or more operation results.
  cancel UUID \[UUID...] Cancel one or more operations (or --all).

positional arguments:
  UUID\_OR\_REF  Operations to cancel. Accepts UUIDs and session-history references (HEAD, HEAD\~N,
               @, @N, @-N, @+N, :N, bare N).

options:
  -h, --help   show this help message and exit
  -a, --all    Cancel every active operation

for coding agents:
  list/show are read-only; cancel mutates remote state
  show and cancel accept multiple UUIDs in one invocation
  show supports @N session-history references inherited from \`contree show\`

agent note:
  Before using this command in an automated workflow, read:
    contree agent
## Behavior The CLI sends a `DELETE` request to the API for each UUID. The operation transitions to `CANCELLED` status. If the sandbox is already running, execution is interrupted. `--all` finds and cancels every active operation in the project. When `--all` is combined with explicit UUIDs, `--all` wins and the explicit UUIDs are ignored with a `WARNING`. On per-UUID API errors (e.g. 404 for an unknown UUID), the command logs the failure and continues with the remaining UUIDs, exiting with status `1` at the end. ## See also * [operation - Manage operations](./operation) — the canonical command (`contree kill` is its shortcut) * [ps - List activity](./ps) — list operations to find UUIDs * [run - Execute a command in the sandbox](./run) — Ctrl-C during `contree run` also cancels the operation